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Late Ordovician animals (Time series) - Wildlife in the Fossil sites

Classified animal and plant picture guide. Clicking the Organism name shows the images, and pointing the Organism name shows the tooltip with three links at the left-top corner.
The Late Ordovician in Paleozoic spanned from 488 to 443.7 millon years ago. The explanation in brackets is the ages they lived in extinct species. Note that Mya is million years ago. For example, "48.6~40.4 Mya" shows a range between 48.6 and 40.4 million years ago. The italic and bold figures, e.g. 488, show out of the range. The time range is shown in the Geological Time Table. The followings are a part of the Evolutionary Tree.
Ordovician, Early Ordovician, Middle Ordovician, Late Ordovician
The right map is the continents at Middle Ordovician provided by C. R. Scotese PALEOMAP Project.
460.9 Mya
460.9~457.5 MyaSea budAscocystites
Sea lilyCaleidocrinus  
TrilobiteReacalymene
460.9~449 MyaSea lilyDiabolocrinus  , Amygdalocystites  , Sinclairocystis, Comarocystites, Platycystites
TrilobiteOnnicalymene
460.9~428.2 MyaTrilobiteCalymenella   (Great Dying①)
460.9~425.4 MyaTrilobiteHadromeros
460.9~260.5 MyaGastropodaPlatyceras   (Great Dying①②)
460.9~0 MyaFirst snail fossil
Snail(Pagoda shells)   (Great Dying①②③④⑤)
Bivalve(Astarte)   (Great Dying①②③④⑤)
460.5 Mya
460.5~450 MyaSea lilyArchaeocrinus  , Achradocystites
CephalopodGonioceras  
Jawless fishAstraspis  
460.5~449.5 MyaEchinodermMyeinocystites
EdrioasteroidEdrioaster  , Isorophusella, Cyathocystis  , Foerstediscus  , Edriophus, Thresherodiscus, Cryptogoleus, Cystaster  
TrilobiteOnnia  
Jawless fishEriptychius
460.5~449 MyaEdrioasteroidAstrocystites
460.5~445.6 MyaEdrioasteroidCarneyella  
460.5~443.7 MyaSpongeBrachiospongia  
EchinodermIowacystis  
EdrioasteroidIsorophus  , Streptaster  
Brittle starLanthanaster
First sea scorpion fossil
Sea scorpionMegalograptus  
460.5~428.2 MyaBrittle starStenaster   (Great Dying①)
460.5~418.1 MyaSea lilyProtaxocrinus   (Great Dying①)
460.5~376.1 MyaCoralHeliolites   (Great Dying①)
460.5~360.7 MyaEdrioasteroidAgelacrinites   (Great Dying①)
460.5~353.8 MyaLamp shellPhilhedra   (Great Dying①②)
Ringed wormArabellites   (Great Dying①②), Eunicites   (Great Dying①②)
460.5~345.3 MyaCephalopodCyrtoceras   (Great Dying①②)
TrilobitePhacops   (Great Dying①②)
460.5~290 MyaCoralSyringopora (Great Dying①②)
460.5~199.6 MyaGastropodaLoxonema   (Great Dying①②③)
460.5~145.5 MyaSpongeChaetetes   (Great Dying①②③④)
457.5 Mya
457.5~409.1 MyaBrittle starProtaster   (Great Dying①)
457.5~391.9 MyaTrilobiteGravicalymene   (Great Dying①)
457.5~376.1 MyaCoralColumnaria   (Great Dying①)
457.5~0 MyaBivalve(Ark clams)   (Great Dying①②③④⑤)
456.1 Mya
456.1~428.2 MyaCoralGrewingkia   (Great Dying①)
453 Mya
453~359 MyaJawless fishFurcacauda   (Great Dying①)
452 Mya
452~383.7 MyaTrilobiteCheirurus   (Great Dying①)
450 Mya
450~443 MyaFirst event of Major extinction (Great Dying①)
450~418.1 MyaTrilobitePapillicalymene   (Great Dying①)
450~409.1 MyaEdrioasteroidRhenopyrgus   (Great Dying①)
449.5 Mya
449.5~391.9 MyaEdrioasteroidPyrgocystis   (Great Dying①)
Brittle starEuzonosoma   (Great Dying①)
449 Mya
449~443.7 MyaChordataPromissum
TrilobiteSoomaspis
449~418.1 MyaSea scorpionOnychopterella   (Great Dying①)
449~388.1 MyaBrittle starEncrinaster   (Great Dying①)
445.6 Mya
445.6~388.1 MyaLamp shellEospirifer   (Great Dying①)
445.6~359.2 MyaSpongeAstylospongia   (Great Dying①)